Osborne, KS has a population of 1,488 and is the 12,740th largest city in the United States. The population density is 944 per sq mi which is 2592% higher than the Kansas average and 942% higher than the national average. The median age in Osborne is 45 which is approximately 25% higher than the Kansas average of 36. In Osborne, 68% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 82% of Osborne residents were born in Kansas, 17% were born out of state, 0% were born outside of the United States and 2% were foreign born.